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Pension and Postretirement Health and Life Benefits | 6 Months Ended
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Jun. 30, 2017
General Discussion of Pension and Other Postretirement Benefits [Abstract] |
Pension and Postretirement Health and Life Benefits | PENSION AND POSTRETIREMENT HEALTH AND LIFE BENEFITS The components of net periodic benefit cost (credit) for the defined benefit pension plans were as follows (in millions):
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2017 |  | 2016 |  | 2017 |  | 2016
Service costs | $ | 1.0 |  |  | $ | 0.9 |  |  | $ | 1.9 |  |  | $ | 1.9 |
Interest costs | 8.0 |  |  | 8.9 |  |  | 16.1 |  |  | 17.7 |
Expected gains on plan assets | (10.2 | ) |  | (10.5 | ) |  | (20.4 | ) |  | (21.0 | )
Actuarial loss from remeasurement | — |  |  | 0.8 |  |  | — |  |  | 0.8 |
Net periodic benefit cost (credit) | $ | (1.2 | ) |  | $ | 0.1 |  |  | $ | (2.4 | ) |  | $ | (0.6 | )
In the second quarter of 2016, the level of lump-sum payments under the non-qualified defined benefit pension plans resulted in the remeasurement of pension obligations under settlement accounting rules. The remeasurement resulted in a loss of $0.8 million included in Selling, General and Administrative Expenses in the second quarter of 2016. The loss includes the effect of a decrease in the discount rate used in the remeasurement of pension obligations from approximately 4.5% as of December 31, 2015, to approximately 3.7% as of June 30, 2016. The components of net periodic benefit cost for the postretirement health and life benefit plans were as follows (in millions):
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2017 |  | 2016 |  | 2017 |  | 2016
Interest costs | $ | 1.8 |  |  | $ | 1.9 |  |  | $ | 3.6 |  |  | $ | 4.0 |
Expected gains on plan assets | — |  |  | — |  |  | — |  |  | (0.1 | )
Amortization of prior service credits, net | — |  |  | — |  |  | (0.1 | ) |  | (0.1 | )
Net periodic benefit cost | $ | 1.8 |  |  | $ | 1.9 |  |  | $ | 3.5 |  |  | $ | 3.8 |

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- Definition The entire disclosure for pension and other postretirement benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 80 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=65877416&loc=SL14450702-114947 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e2410-114920 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 60 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6414203&loc=d3e39675-114964 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 60 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=66047640&loc=d3e39622-114963 + Details
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